producedNFLPlayers

Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning.  
# Instructions
Focus on describing the relationship, not the entities themselves. 
# Response Format
Begin the description with \' Indicates...\'

Predicate: producedNFLPlayers

Indicates that one entity has been the origin, source, or training ground for individuals who later became NFL players.